/*
 * Tencent is pleased to support the open source community by making Angel available.
 *
 * Copyright (C) 2017 THL A29 Limited, a Tencent company. All rights reserved.
 *
 * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 *
 * https://opensource.org/licenses/BSD-3-Clause
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.tencent.angel.master.deploy.yarn;

import com.tencent.angel.common.Id;
import com.tencent.angel.master.deploy.ContainerAllocatorEventType;
import java.util.Arrays;
import org.apache.hadoop.yarn.api.records.Priority;
import org.apache.hadoop.yarn.api.records.Resource;

/**
 * Request a container event. It contains resource context.
 */
// TODO: 17/6/28 by zmyer
public class YarnContainerRequestEvent extends YarnContainerAllocatorEvent {
    /** container resource quota */
    private final Resource resource;

    /** the expected host addresses, it used to local calculation */
    private final String[] hosts;

    /**
     * Create a YarnContainerRequestEvent
     *
     * @param id task id
     * @param resouce container resource quota
     * @param priority resource priority
     */
    public YarnContainerRequestEvent(Id id, Resource resouce,
        Priority priority) {
        this(id, resouce, priority, null);
    }

    /**
     * Create a YarnContainerRequestEvent
     *
     * @param id task id
     * @param resouce container resource quota
     * @param priority resource priority
     * @param hosts the expected host addresses
     */
    public YarnContainerRequestEvent(Id id, Resource resouce,
        Priority priority, String[] hosts) {
        super(id, ContainerAllocatorEventType.CONTAINER_REQ, priority);
        this.resource = resouce;
        this.hosts = hosts;
    }

    /**
     * Get container resource quota
     *
     * @return container resource quota
     */
    public Resource getResource() {
        return resource;
    }

    /**
     * Get the expected host addresses
     *
     * @return the expected host addresses
     */
    public String[] getHosts() {
        return hosts;
    }

    @Override
    public String toString() {
        return "YarnContainerRequestEvent [resource=" + resource + ", hosts=" + Arrays.toString(hosts) + ", toString()=" + super.toString() + "]";
    }
}
